Although 29 least developed countries that had been contracting parties of the General Agreement on Tariffs and Trade became de facto WTO members, others have had to negotiate their accession to WTO.
Si bien 29 países menos adelantados que eran partes contratantes en el Acuerdo General sobre Aranceles Aduaneros y Comercio pasaron a ser miembros de facto de la OMC, otros han tenido que negociar su ingreso a esta organización.